If you are minded to do so, may I suggest you check the Instagram account of #francophileonthemove ?
He has some beautiful examples of menus from many airlines' premium cabins from post-war to the 1980's, with a very expert insight into the dishes as well as pics of the actual menus, the meal and drinks lists,
His last couple were from Pan Am in the 1960's, Braniff from the late-40's and BCal LGW-CDG from the 1980's. Very, very entertaining. And the account is not mine, I hasten to add.